1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd248467757811845f5266db99a319008204332059f1b802b41fe2636d0dae6. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82334b89-7f04-4b19-9876-e4c56b509a53.json and https://artists.proofprofile.net/proofs/artist/82334b89-7f04-4b19-9876-e4c56b509a53.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Madrid Atrium Musicae: Three Centuries of La Spagna
Re di Spagna (Libro dell'arte del Danzare, 1455): Re di Spagna [Libro dell'arte del Danzare, 1455]
La Spagna - La Spagna (Bologna, 1505): La Spagna - La Spagna [Bologna, 1505]
Olvida tu Perdicion España (Cancionero de la Colombina, c. 1500)
Spagnioler tancz - Hopper dancz, "Spagna"
Espagnoletta (Codice Magliabec, 1635): Espagnoletta [Codice Magliabec, 1635]
Spagnoletto - Villanicco di Spagna - Pavaniglia di Spagna - Spagnoletto da capo
Gagliarde a 5: Gagliarda quarta a 5 alla Spagnola
The Spaynard (Elizabeth Rogers hir Virginall booke, c. 1657)
Ricercar Spagnuola, "duna cossa spagnola"
Tres sobre el canto llano de la alta (sobre la Spagna)
Arab-Andalusian music: M'saddar - Sana'a
Arab-Andalusian music: M'shalya - Touchia - Sana'a
Evolution of Classical Music: The 16th Century